Step-Down DC/DC Converter with Three High PSRR LDOs

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Manufacturer Skyworks


Description :

The AAT2612 is a multiple rail power management IC. It integrates a 600mA high-frequency switching-converter and three 300mA linear regulators. The switching power supply is a highly-integrated monolithic step-down converter operating at 1.5MHz, achieving high efficiency with small external components. The three linear regulators are high PSRR low dropout regulators (LDOs) providing accurate regulation and excellent transient response. The step down converter is programmable with external feedback resistors, and the three LDOs are fixed voltage outputs of six combinations for 1.8V, 2.8V, 3.0V and 3.3V. Integrated over-current or over-temperature protection circuitry becomes active as appropriate, when either fault occurs, and the AAT2612 recovers automatically when the fault is removed. The AAT2612 is available in a Pb-free, thermally enhanced 20-pin TQFN33 package.

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    • Current Mode Control DC/DC Converter:
    • Programmable Output Up to 600mA
    • 1.5MHz Switching Frequency
    • Up to 90% Efficiency
    • Integrated Switching Power FETS
    • Integrated Compensation Network
    • Internal Current Limit
    • 3 Low Dropout Regulators with Separate Enable Pins:
    • 300mA per Channel
    • High PSRR
    • Factory Programmable Output
    • Integrated Soft-Start
    • Over-Current Protection
    • Over-Thermal Protection
    • TQFN33-20 Package

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Features Similar products
Control scheme Fixed Frequency Peak Current Control  

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Switching frequency (kHz) 1500  
Max Input Voltage (V) 2.5 to 5.5  
Output Voltage (V) 0.9 Min  
Typ. Active Current (µA) 120  
Typ. Dropout Voltage @ Max. lout (mV) 500 Max  
Typ. Output Voltage Accuracy (%) ± 3  
Output Capacitor Type 4.7 μF, X5R or X7R Ceramic Capacitor  
Output Current (mA) 600  
Operating Temperature (°C) -40 to +85  
Package TQFN33-20